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Report Produced: 06/15/2025 23:54 PM

Report Question ID Question Discussion Answer Year
20130152 Primary site/Histology--Brain and CNS: How is the primary site and histology coded for a 2013 diagnosis of squamous cell carcinoma arising in a dermoid cyst of the third ventricle? See Discussion. Patient has a dermoid cyst of the third ventricle of the brain diagnosed in 1998. In 2013 the cyst was removed and was diagnosed as squamous cell carcinoma. An internet search revealed a journal article in the Journal or Neuro-Oncology that states, "Although rare, malignant transformation of intracranial epithelial cysts has a poor prognosis." The combination of site C715 [third ventricle, NOS] and histology 8070/3 [squamous cell carcinoma] fails SEER Edit IF 38_3: Primary site and Morphology Impossible. According to the literature, intracranial squamous cell carcinoma is very rare with most cases arising from a preexisting benign epidermoid cyst. The combination of C71_ and 8070/3 should be allowed. We will submit a request to have this edit revised. 2013
20130151 Primary site--Heme & Lymphoid Neoplasms: What is the primary site when a splenectomy shows "T large granular lymphocytic leukemia" and the peripheral blood flow cytometry is negative? See Discussion. The physician note states there is no evidence of leukemia on peripheral blood. The disease is localized to the spleen. Is the primary site coded to the bone marrow [C421] or can it be coded to the spleen [C422]?

For cases diagnosed 2010 and forward, access the Hematopoietic Database at http://seer.cancer.gov/seertools/hemelymph.

Code the primary site to C421 [bone marrow]. Leukemias are coded to the bone marrow per the Heme DB.

SEER*Educate provides training on how to use the Heme Manual and DB. If you are unsure how to arrive at the answer in this SINQ question, refer to SEER*Educate to practice coding hematopoietic and lymphoid neoplasms. Review the step-by-step instructions provided for each case scenario to learn how to use the application and manual to arrive at the answer provided. https://educate.fhcrc.org/LandingPage.aspx.

2013
20130150

MP/H Rules/Histology--Bladder: What is the histology code histology code for a bladder TUR that demonstrates mixed invasive urothelial and small cell carcinoma? See Discussion.

SINQ 20041104 (prior to 2007 MP/H rules) states to code histology to 8045. The MP/H rules do not address this combination of urothelial and small cell carcinoma. The current MP/H rule that applies is Rule H8, code the higher histology (8120/3). However, if the histology is coded to 8120/3, the fact that small cell carcinoma exists will be lost. If the small cell carcinoma drives the treatment plan/prognosis, shouldn't this situation be reflected in the rules for coding histology?

Code the histology to 8045/3 [mixed small cell carcinoma]. The presence of small cell carcinoma drives the treatment decisions for this case.

This issue will be addressed in the next revision of the MP/H rules.

2013
20130149 MP/H Rules/Histology--Testis: What is the histology code for a testis primary with embryonal carcinoma (70%), yolk sac tumor (30%), and a focus of seminoma (<1%)? See Discussion.

The right orchiectomy specimen showed a mixed histology tumor. The retroperitoneal lymph nodes showed teratoma, NOS only. Does the presence of teratoma in the lymph nodes change the histology coding?

The MP/H Rules for Other Sites, Table 2 (Mixed and Combination Codes) does not include the combination of embryonal carcinoma, yolk sac tumor and seminoma. SINQ 20110013 does state the combination of embryonal carcinoma and yolk sac tumor should be coded to histology 9065/3 [germ cell tumor, nonseminomatous]. In this case, is the focus of seminoma comprising <1% included when coding the histology? If the seminoma is included, Table 2 still does not address this combination.

Code the histology to mixed germ cell tumor [9085/3] per Rule H16; code the appropriate combination/mixed code when there are multiple specific histologies.

According to the WHO Classification of Tumors of the Male Genital Organs, tumors of more than one histologic type (mixed forms) can occur in any combination of various germ cell histologies including embryonal, yolk sac, teratoma, and choriocarcinoma. Mixed teratoma and seminoma is included under histology code 9085/3 [mixed germ cell tumor] in the ICD-O-3. The revised MP/H rules will expand on these mixed testicular histologies.

Priority for coding histology is using the diagnosis from the primary site (when possible) over the histology from a metastatic site. The presence of teratoma, NOS in the retroperitoneal lymph nodes does not change the histology code.

2013
20130148 Reportability--Brain and CNS: Are "spinal" schwannomas reportable if stated to be extradural, vertebral nerve sheath, or of specific vertebrae? See Discussion.

Are any of the following cases reportable?

Example 1: Clinical Diagnosis: Extradural spinal cord tumor compatible with schwannoma. What assumptions should be made about reportability if the tumor is described as being extradural? The extradural spinal cord includes epidural fat surrounding the thecal sac and exiting nerve roots. Does this mean there are not nerve roots in the extradural spinal cord?

Example 2: Final Pathologic Diagnosis: Designated "C3-4 nerve sheath tumor" excision: Morphologic and immunohistochemical findings consistent with cellular schwannoma. When stated to be a "nerve sheath tumor" does that mean peripheral nerve (C47_) involvement or nerve root (C72_) involvement?

Example 3: Final Pathologic Diagnosis: T-8 vertebral tumor resection: Schwannoma with degenerative changes (calcification, cyst formation) - ganglion and nerve are identified. There is no mention clinically or pathologically whether this tumor is "intradural" or "of the nerve root." In the absence of information about whether the location of the tumor is intradural or involving the nerve root, is it assumed that it does involve this part of the spinal cord when a specific vertebrae is removed?

Extradural schwannomas are not reportable. Neither vertebral nerve sheath nor a location of/on a specific vertebrae confirm the origin as being either extradural or intradural. Do not report a schwannoma if it cannot be determined to be "intradural" or "of the nerve root." 2013
20130147 Primary site--Heme & Lymphoid Neoplasms: What the primary site for a diagnosis of Langerhans cell histiocytosis with multifocal multisystem involvement of the skin, chest, CNS and thyroid, but no evidence of involvement on a bone scan?

For cases diagnosed 2010 and forward, access the Hematopoietic Database at http://seer.cancer.gov/seertools/hemelymph.

Code the primary site to C809 [unknown].

Langerhans Cell Histiocytosis (LCH) includes three major groups:

  • Unifocal: Slowly progressing disease, involves one organ.

  • Multifocal unisystem: Involves several organs in one system.

  • Multifocal multisystem: Involves several organs in two or more systems.

    • When the disease is both multifocal and multisystem, code the primary site to unknown [C809] because there is no way to identify the origin of the neoplasm in this situation.

    SEER*Educate provides training on how to use the Heme Manual and DB. If you are unsure how to arrive at the answer in this SINQ question, refer to SEER*Educate to practice coding hematopoietic and lymphoid neoplasms. Review the step-by-step instructions provided for each case scenario to learn how to use the application and manual to arrive at the answer provided. https://educate.fhcrc.org/LandingPage.aspx.

    		2013
    		20130146 Histology--Heme & Lymphoid Neoplasms: What is the histology code for a diagnosis of myeloproliferative neoplasm/myelodysplastic syndrome overlap?

    For cases diagnosed 2010 and forward, access the Hematopoietic Database at http://seer.cancer.gov/seertools/hemelymph.

    Code the histology to 9975/3 [myelodysplastic/myeloproliferative neoplasm, unclassifiable]. Per the Definition section in the Heme DB, this neoplasm has the, "Clinical laboratory and morphological features of myeloproliferative neoplasm but fails to meet the criteria for a specific myeloproliferative neoplasm; or presents with features that overlap two or more MPN neoplasms."

    SEER*Educate provides training on how to use the Heme Manual and DB. If you are unsure how to arrive at the answer in this SINQ question, refer to SEER*Educate to practice coding hematopoietic and lymphoid neoplasms. Review the step-by-step instructions provided for each case scenario to learn how to use the application and manual to arrive at the answer provided. https://educate.fhcrc.org/LandingPage.aspx.

    		2013
    		20130142

    Multiple primaries/Histology--Heme & Lymphoid Neoplasms: How many primaries are reported if a 2010 inguinal lymph node biopsy diagnosis of follicular lymphoma, grade 1 is subsequently diagnosed in 2012 with a 50% follicular, grade 3 and 50% diffuse large B-cell via a biopsy of an axillary mass?

    In 2010 a left inguinal lymph node biopsy revealed follicular lymphoma, grade 1. There were no other suspicious lymph nodes in the body.

    In 2012 a biopsy of a large axillary mass revealed a a 50% follicular, grade 3 and 50% diffuse large B-cell.

    According to the rules, the transformation to a B-cell is new primary. Is the mixed cell neoplasm a single primary?

    For cases diagnosed 2010 and forward, access the Hematopoietic Database at http://seer.cancer.gov/seertools/hemelymph.

    There are two reportable primaries for this case -- follicular lymphoma in 2010 and DLBCL in 2012.

    First determine the histologies needed to to determine the number of primaries to report. We determined the histologies are follicular lymphoma, grade 1 for 2010 and DLBCL for 2012 as follows:

    •  
    • Rule M4, a mix of DBLCL and follicular lymphoma, grade 3 is a single primary when two or more types of non-Hodgkin lymphoma are simultaneously present in the same anatomic location(s), such as the same lymph node or lymph node region(s), the same organ(s), and/or the same tissue(s). Additionally, the instruction per Rule PH11 indicates one is to code the histology to diffuse large B-cell lymphoma (DLBCL) (9680/3) when DLBCL and any other non-Hodgkin lymphoma (i.e., follicular lymphoma, grade 3) are present in the same lymph node(s), lymph node region(s), organ(s), tissue(s) or bone marrow.

    Per the Hematopoietic database, follicular lymphoma (all types are chronic) transforms to DLBCL (acute). Per Rule M 10 instructions, "Abstract as multiple primaries when a neoplasm is as a neoplasm there is a of an neoplasm after the chronic diagnosis." Therefore, abstract the DLBCL as a second primary.

    SEER*Educate provides training on how to use the Heme Manual and DB. If you are unsure how to arrive at the answer in this SINQ question, refer to SEER*Educate to practice coding hematopoietic and lymphoid neoplasms. Review the step-by-step instructions provided for each case scenario to learn how to use the application and manual to arrive at the answer provided. https://educate.fhcrc.org/LandingPage.aspx.

    		 2013
    		20130140 Reportability/Ambiguous terminology--Heme & Lymphoid Neoplasms: Is a peripheral blood sample with an immunophenotype that is "characteristic of B-cell chronic lymphocytic leukemia" reportable?

    For cases diagnosed 2010 and forward, access the Hematopoietic Database at http://seer.cancer.gov/seertools/hemelymph.

    This is a reportable diagnosis of chronic lymphocytic leukemia [9823/3]. The physician is using the terms "characteristic of" in the same manner as he/she would use the terms "diagnostic of."

    This case fits with the usual diagnosis of CLL. The peripheral blood is diagnostic for leukemias. There was a specific leukemia noted, B-cell chronic lymphocytic leukemia. CLL (B-cell is the phenotype) is usually diagnosed incidentally by a peripheral smear because it is asymptomatic. However, we recommend looking for further work-up, such as a bone marrow biopsy.

    SEER*Educate provides training on how to use the Heme Manual and DB. If you are unsure how to arrive at the answer in this SINQ question, refer to SEER*Educate to practice coding hematopoietic and lymphoid neoplasms. Review the step-by-step instructions provided for each case scenario to learn how to use the application and manual to arrive at the answer provided. https://educate.fhcrc.org/LandingPage.aspx.

    		2013
    		20130139 Histology--Heme & Lymphoid Neoplasms: How is the histology coded when the original slides are reviewed at a later date and the revised diagnosis changes the histology? See Discussion.

    Diffuse large B-cell lymphoma [9680/3] diagnosed in 5/2010 and treated with chemotherapy. In 11/2012 a bone marrow biopsy revealed small lymphocytic lymphoma (CLL/SLL) [9823/3].

    The 2010 slides were reviewed and showed, "a large cell lymphoid proliferation, many of the cells which appear to be prolymphocytes. There are background smaller lymphocytes that are consistent with CLL/SLL. In retrospect, the lymph node most likely represented a prolymphocytic conversion in SLL."

    The medical oncologist is calling this a recurrent lymphoma. Should the original 5/2010 diagnosis be changed to 9823/3 [CLL/SLL]? Is this documented in the Heme Manual?

    For cases diagnosed 2010 and forward, access the Hematopoietic Database at http://seer.cancer.gov/seertools/hemelymph.

    Change the histology of the original 2010 diagnosis to 9823/3 [chronic lymphocytic leukemia/small lymphocytic lymphoma] based on the review of the 2010 slides. The 2010 diagnosis was revised based on the review of slides and the histology should be changed accordingly. The closest example of this is located in the SEER Manual, Changing Information on the Abstract, instruction 3, example 4.

    Histology code 9670/3 [SLL] is obsolete for cases diagnosed 2010 and later. All diagnoses of CLL/SLL, CLL, and SLL are now coded to histology code 9823/3 [CLL/SLL].

    SEER*Educate provides training on how to use the Heme Manual and DB. If you are unsure how to arrive at the answer in this SINQ question, refer to SEER*Educate to practice coding hematopoietic and lymphoid neoplasms. Review the step-by-step instructions provided for each case scenario to learn how to use the application and manual to arrive at the answer provided. https://educate.fhcrc.org/LandingPage.aspx.

    		2013